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參數(shù)資料
型號(hào)： TPS62111RSATG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 2.4 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, PQCC16
封裝： GREEN, PLASTIC, QFN-16
文件頁(yè)數(shù)： 5/28頁(yè)
文件大小： 842K
代理商： TPS62111RSATG4
V (nominal)
O
0.8%
1.6%
–1.6%
t
I
SKIP
V
I
25
W
(1)
SOFT START
100% DUTY-CYCLE, LOW-DROPOUT OPERATION
I
O
DS(on)
(L)
V min
V max I max (r
max R
)
=
+
g
(2)
www.ti.com .................................................................................................................................................... SLVS585A – JULY 2005 – REVISED FEBRUARY 2009
DETAILED DESCRIPTION (continued)
Figure 18. Power-Save Mode Output-Voltage Thresholds
The typical PFM (SKIP) current threshold for the TPS6211x is given by:
Equation 1 is valid for input voltages up to 7 V. For higher voltages, the skip current threshold is not increased
further. The converter enters the fixed-frequency PWM mode as soon as the output voltage falls below VO –
1.6% (nominal).
The TPS6211x has an internal soft-start circuit that limits the inrush current during start-up. This prevents
possible voltage drops of the input voltage when a battery or a high-impedance power source is connected to the
input of the TPS6211x.
The soft start is implemented as a digital circuit increasing the switch current in steps of 300 mA, 600 mA, 1200
mA. The typical switch current limit is 2.4 A. Therefore, the start-up time depends on the output capacitor and
load current. Typical start-up time with a 22-F output capacitor and 800-mA load current is 1 ms.
The TPS6211x offers the lowest possible input-to-output voltage difference while still maintaining operation with
the use of the 100% duty-cycle mode. In this mode, the P-channel switch is constantly turned on. This is
particularly useful in battery-powered applications to achieve the longest operation time, taking full advantage of
the whole battery voltage range. The minimum input voltage to maintain regulation depends on the load current
and output voltage, and is calculated as:
with:
IOmax = maximum output current plus inductor ripple current
rDS(on)max = maximum P-channel switch rDS(on)
R(L) = dc resistance of the inductor
VOmax = nominal output voltage plus maximum output-voltage tolerance
Copyright 2005–2009, Texas Instruments Incorporated
13
Product Folder Link(s): TPS62110 TPS62111 TPS62112 TPS62113
相關(guān)PDF資料
PDF描述
TPS62111RSAR 2.4 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, PQCC16
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TPS62110RSARG4 2.4 A SWITCHING REGULATOR, 1100 kHz SWITCHING FREQ-MAX, PQCC16
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TPS62112RSAR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.5A 17V Sync Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62112RSARG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.5A 17V Sync Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62112RSAT 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.5A 17V Sync Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62112RSAT 制造商:Texas Instruments 功能描述:IC STEP-DWN CONV 5V 1.5A 16-VQFN 制造商:Texas Instruments 功能描述:IC, STEP-DWN CONV 5V 1.5A 16-VQFN 制造商:Texas Instruments 功能描述:IC, STEP-DWN CONV 5V 1.5A 16-VQFN; Primary Input Voltage:17V; No. of Outputs:1; Output Voltage:16V; Output Current:1.5A; Voltage Regulator Case Style:QFN; No. of Pins:16; Operating Temperature Min:-40C; Operating Temperature ;RoHS Compliant: Yes
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